Service · System expansion
New sprinkler zone installation
Yards change — new beds go in, trees come down, a pool rearranges everything — and the sprinkler system is supposed to keep up. We add zones to existing systems cleanly: tee’d at the manifold, wired properly, matched to what they water, and legal under the same license that designed the rest.
Added to your existing system · flat quote per zone · You approve the flat price before any work begins
Texas Licensed Irrigator — LI0026061Required by Texas law for sprinkler repair. Ask any company for theirs.
Request sprinkler service
Describe the problem — we'll call back with an arrival window, usually same day.
Expansion services
Six reasons systems grow
A new zone is the right tool more often than people think — and the wrong tool when a repair would do. We'll tell you which is which.
Turf extensions & new lawn areas
Coverage for the side yard that never had it, or the new sod that needs it — designed head-to-head like it should have been originally.
Bed & drip zones
New landscaping deserves its own hydrozone — drip at the roots on its own schedule, not a corner of the lawn’s.
Foundation watering rings
The clay-country classic: a dedicated perimeter drip zone protecting the slab, added without touching your turf zones.
Zone splits for weak pressure
A zone with too many heads waters nothing well. Splitting it in two fixes the physics permanently — once we’ve ruled out a leak.
Controller expansion
Out of stations? Expansion modules or a controller upgrade, wired and programmed — usually the same visit as the new zone.
Code-clean tie-ins
Every addition keeps the backflow protection intact and the system legal — the part of expansion the license is for.
Same components as our repairs — Rain Bird and Hunter valves, matched-precipitation heads, pressure-regulated drip hardware — with unions at the new valve and the zone documented, so the next tech (us or anyone) isn’t guessing.
Diagnosis guide
Is a new zone the right answer?
Six situations that end in a new zone — and the honest checks that come first.
One zone barely pops its heads
Often an overloaded zone — too many heads for the supply — and the permanent fix is a split. But first we rule out the cheaper culprits: a leak, a half-closed valve, a clogged filter.
A corner of the yard you hand-water forever
The hose ritual is a design gap. A zone extension with proper head spacing retires it — and usually costs less than people have assumed for years.
New beds sharing the lawn’s schedule
Shrubs and turf want opposite watering. Beds riding a turf zone get fungus or drought, never both right — their own drip zone ends the compromise.
The pool remodel rearranged everything
Hardscape projects cut lines and strand heads routinely. We reroute, consolidate, and add the zone the new landscape plan actually needs.
A foundation company prescribed consistent moisture
That prescription, automated: a dedicated perimeter drip ring on its own schedule — the most common new zone we add.
The controller has no room left
Out of stations isn’t out of options — expansion modules and modern controllers solve it, usually the same visit.
Flat-rate pricing
Flat-rate zone pricing
Every repair is a flat rate quoted before work begins — never hourly, never a running meter while someone digs. The service call covers a full zone-by-zone diagnosis and applies to your repair, so diagnosis is effectively free when we do the work.
| Repair | Flat rate | What it covers |
|---|---|---|
| Site visit & zone design | $[XX] | Supply, pressure, and routing assessed; flat quote on the spot. Applied to the work. |
| Drip / bed zone, installed | from $[XXX] | Valve, regulator, filter, tubing, wiring, programming. |
| Spray or rotor turf zone, installed | from $[XXX] | Valve, pipe, matched heads at head-to-head spacing, wiring, programming. |
| Zone split (overloaded zone) | flat, after diagnosis | New valve and re-piping to divide the load — pressure fixed permanently. |
| Controller expansion / upgrade | from $[XXX] | Modules or replacement controller, all zones migrated and labeled. |
Your flat rate depends on depth, access, and parts — but once quoted, it does not move. You approve the number before a shovel touches dirt. Full breakdown with examples on our sprinkler repair cost guide.
Local knowledge
Hydrozoning — the design idea that makes everything water right
The principle behind every zone we add: group plantings by what they drink, and give each group its own valve.
Why hydrozones — one schedule can’t serve two masters
Turf wants frequent, moderate water; shrubs want deep and infrequent; a foundation ring wants slow and steady; new trees want their own logic entirely. One zone serving two of these waters both wrong — the fungus-and-drought compromise behind half the sad beds in Plano and Frisco. A new zone isn’t a luxury add-on; it’s how a system tells two different truths at once.
It’s also how the watering ordinances get easier, not harder: drip zones enjoy friendlier rules in our cities, and a controller programmed by hydrozone keeps the turf legal while the beds and foundation run their own compliant logic.
The tie-in — what a clean addition looks like
A proper zone addition tees at the manifold or sets a new valve box where routing makes sense, pulls fresh wire (never piggybacked), and matches the hardware to the job — matched-precipitation heads for turf, regulated and filtered drip for beds. Trenches are cut clean, turf plugs go back where they came from, and where the run crosses hardscape we bore rather than cut.
Then the boring parts that decide the next decade: unions at the new valve, the zone wired and labeled at the controller, the run documented. The systems we curse on repair calls are the ones nobody documented; we don’t make more of them.
The process
What adding a zone actually involves
Most single-zone additions are a one-day project once quoted. Here's the sequence.
The build — five steps
| Step | What happens |
|---|---|
| Design & supply check | Pressure and flow measured — the math that decides how many heads the new zone can honestly carry |
| Valve set & tie-in | Tee’d at the manifold or a new box on the main — with the backflow protection verified intact |
| Pipe & wire | Clean trenching, fresh wire pulled to the controller, bores under any hardscape in the path |
| Heads or drip | Matched-precipitation heads at head-to-head spacing — or regulated, filtered drip — set to grade |
| Program & prove | The zone runs while you watch, labeled at the controller, scheduled to your city’s rules |
Lawn disruption is the universal worry, and the honest answer: trenches are narrow, plugs are replaced, and turf knits back within weeks — and where it’s a fresh-sod situation anyway, our sod crew is the same phone number.
The legal layer — alterations are licensed work
Texas law treats adding zones and altering an irrigation system for compensation as licensed irrigation work — the same TCEQ license as repair, and for good reason: a bad tie-in can compromise the backflow protection that keeps irrigation water out of the drinking supply. Where your city requires anything procedural for the work, handling it is part of being the license holder.
Every addition leaves the system as legal as we found it or better: backflow intact, rain/freeze sensing respected, the controller on your city’s schedule. The license number is LI0026061 — on the quote, on this page, on file with the state.
Your specialist
Meet Jonathan, your irrigation specialist
Eldorado isn't a landscaper with a trencher — zone additions are system design, and the judgment comes from repairing what bad additions do. Jonathan has been expanding North Texas systems cleanly since 2013, license LI0026061, from the east Plano shop.
His rule on every job is the one customers keep repeating in reviews: fix only what's broken. You get a zone-by-zone diagnosis, a flat price before work starts, and an honest answer when something doesn't need replacing.
The visit
How a repair visit works
No mystery invoices. The price is on the table before a shovel touches dirt.
Call & describe
Tell us what changed — new beds, a weak zone, a foundation prescription, a corner you’re tired of hand-watering.
Zone-by-zone diagnosis
We measure pressure and flow, check what the supply can honestly carry, and quote the zone flat — with the cheaper repair named first if one would do.
Flat quote, your call
You get the exact price before any work begins. The service call fee is applied to the repair.
Repair & prove it
We build it in a day for most single zones, run it with you watching, and leave it labeled, documented, and scheduled to your city’s rules.
Field record
Recent zone work
Real jobs, our own photos — valve boxes, manifolds, trench lines, and the lawns after.
Reviews
What our customers say
"Many charge outrageous fees and try and upsell. Eldorado doesn't do that. Pleasant, responsive and most importantly, honest... 5 star and will be my go-to sprinkler guys."
"Came out same day and took care of business at an unbelievable price. Took about 30 minutes to diagnose and repair. Would absolutely utilize again."
"They gave me options and fixed only what needed to be fixed. They are honest good people that do good work."
Questions
Zone installation, asked & answered
Can you add a zone to my existing sprinkler system?
Yes — it's the standard project: a tee at the manifold or a new valve box on the main, fresh wire to the controller, and the heads or drip the new area actually needs. Your existing zones aren't disturbed, and most single-zone additions are a one-day build once quoted.
How much does it cost to add a sprinkler zone?
Drip and bed zones install from $[XXX]; spray or rotor turf zones from $[XXX] — both including the valve, wiring, hardware, and programming. Zone splits for overloaded zones are quoted flat after diagnosis. The $[XX] site visit produces the design and the flat quote, and it's applied to the work.
My zone has weak pressure — do I need a zone split?
Maybe — but the honest diagnosis comes first, because a leak, a half-closed valve, or a clogged filter produces the same symptom for a fraction of the cost. If the zone genuinely carries more heads than the supply can serve, a split is the permanent fix: a new valve dividing the load, pressure restored on both halves. Rule out the cheap culprits first: leak detection.
My controller is out of stations — is that a dealbreaker?
No — expansion modules fit many controllers, and where yours can't grow, a modern replacement migrates every zone and adds room, usually the same visit as the new zone. Smart controllers make particular sense at that moment; you're already paying for the swap. See controller upgrades.
Will adding a zone tear up my lawn?
Less than people fear: trenches are narrow, turf plugs go back where they came from, and the lines knit invisible within a few weeks. Runs that cross walks or driveways get bored underneath rather than cut. Where the project is headed for new sod anyway, the trenching and the sod are one coordinated job.
Should my new flower beds get their own zone?
Almost always — beds riding a turf zone get the fungus-or-drought compromise, never both right. A dedicated drip zone waters at the roots on its own schedule, enjoys friendlier treatment under our cities' watering rules, and ends the overspray on your windows. See drip irrigation.
Can you add a foundation watering zone?
It's the most common zone we add — a dedicated drip ring at the slab perimeter, regulated and filtered, on the slow year-round schedule the clay wants. The whole story lives on its own page. See foundation watering.
How many heads can a new zone support?
Whatever the supply math says — we measure your pressure and flow at the site visit and design to it, which is exactly the step builder-grade systems skipped. An honestly designed zone waters head-to-head with room to spare; an optimistic one becomes the weak zone someone calls us about in five years.
Does adding a zone require a licensed irrigator in Texas?
Yes — adding zones and altering a system for compensation is licensed irrigation work under Texas law, partly because a bad tie-in can compromise the backflow protection on your drinking water. Eldorado is owned and operated by a Texas Licensed Irrigator, LI0026061.
Can you reroute lines after a pool or patio project?
Routinely — hardscape projects cut lines and strand heads as a matter of course. We reroute around the new construction, consolidate what's left sensibly, and add the zone the new landscape plan actually calls for, documented so the next project doesn't repeat the archaeology.
Will the new zone match my existing system’s brand?
Where it matters, yes — and where it doesn't, we'll say so. Valves and heads interchange across brands more than people expect; what must match is precipitation rate within the zone and wiring compatibility at the controller. Either way the new zone gets labeled and documented.
How fast can you design and build a new zone?
Site visit within a few days, most single zones built within the week after approval. Call (469) 970-2715 with what changed in the yard and we'll start there.
What areas do you cover for zone installation?
Everything within about 30 minutes of our east Plano shop: Plano, Frisco, McKinney, Allen, Richardson, Dallas, and North Dallas.
Service area
New zone installation available across North DFW
Licensed repair within about 30 minutes of our east Plano shop:
Searching “add a sprinkler zone” or “sprinkler system expansion near me”? Our east Plano shop puts the license that designs additions — not just digs them — within about 30 minutes of all of Collin County and North Dallas.
Adjacent projects share the visit: drip & foundation watering for the zone’s contents, controller upgrades for the stations, and sod installation where the new coverage meets new grass.
Yard outgrew the system?
Most single zones are designed, quoted, and built within the week — call for the site visit.